INT 7D - SCSILink - SET TIMEOUT                                                 
	AH = 03h
	AL = timeout selector (see #03865)
	BX = new value in 55ms ticks
Desc:	change an internal timeout value to allow communication with very
	  slow targets


(Table 03865)
Values for SCSILink timeout selector:
 00h	time to wait for bus (default 18)
 01h	time to wait for new phase (default 5)
 02h	maximum time to send/receive block (default 18)
 03h	time to wait for reselect (default 180)